Dr. Kenneth J. Ewing Profile

Dr. Kenneth J. Ewing

Senior Research Scientist at US Naval Research Lab

SPIE Involvement:

Author

Publications (29)

Proceedings Article | 7 June 2024 Presentation + Paper

Sulfur-rich infrared transmitting polymer fibers

Darryl Boyd, Vinh Nguyen, Daniel Rhonehouse, Geoffrey Chin, Frederic Kung, Kenneth Ewing, Daniel Gibson, Woohong Kim, Jasbinder Sanghera

Proceedings Volume 13042, 130420C (2024) https://doi.org/10.1117/12.3015280

KEYWORDS: Polymers, Infrared radiation, Optical fibers, Sulfur, Polymer optics, Waveguides, Polymer optical fibers, Optical transmission, Glasses

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Proceedings Article | 8 March 2024 Presentation + Paper

Measuring transmission at the Christiansen wavelength for dynamic sand samples

Cobey McGinnis, Jesse Frantz, Jason Myers, Anthony Clabeau, Austin Moore, Kenneth Ewing, Matthew Hart, Abbie Watnik, Jasbinder Sanghera

Proceedings Volume 12882, 1288203 (2024) https://doi.org/10.1117/12.3001651

KEYWORDS: Sand, FT-IR spectroscopy, Particles, Optical transmission, Light scattering

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Proceedings Article | 30 May 2022 Presentation + Paper

Detection of chemical liquid hazards on surfaces using biomimetic stand-off sensing

Scott Rogers, Chris Howle, Ken McEwan, Kevin Major, Brandon Shaw, Kenneth Ewing

Proceedings Volume 12116, 121160N (2022) https://doi.org/10.1117/12.2622900

KEYWORDS: Liquids, Sensors, Infrared radiation, Electronic filtering, Chemical weapons, Optical filters, Mirrors, Infrared spectroscopy, Biomimetics

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Proceedings Article | 30 May 2022 Presentation + Paper

Chemical vapor detection using a passive infrared bioinspired sensor

Kevin Major, Robert Nicol, Jasbinder Sanghera, L. Brandon Shaw, Alan Samuels, Charles Davidson, Avishai Ben-David, Kenneth Ewing

Proceedings Volume 12116, 121160S (2022) https://doi.org/10.1117/12.2620557

KEYWORDS: Sensors, Infrared sensors, Bioalcohols, Black bodies, Infrared radiation, Industrial chemicals, Optical filters, Infrared detectors, Signal detection, Temperature metrology

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Proceedings Article | 15 April 2021 Presentation + Paper

Detection of chemical threats on surfaces using a human color vision inspired sensing method

Kevin Major, Jasbinder Sanghera, L. Shaw, Chris Howle, Ken McEwan, Kenneth Ewing

Proceedings Volume 11749, 117490L (2021) https://doi.org/10.1117/12.2589553

KEYWORDS: Color vision, Sensors, Infrared sensors, Biological and chemical sensing, Optical filters, Nerve agents, Infrared radiation, Infrared detectors, Environmental sensing, Chemical fiber sensors

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Proceedings Article | 5 March 2021 Presentation + Paper

Identification of cancerous lesions from healthy skin using an infrared, optical filter based approach

Kevin Major, Jas Sanghera, Kenneth Ewing

Proceedings Volume 11618, 116180Y (2021) https://doi.org/10.1117/12.2578820

KEYWORDS: Skin cancer, Skin, Optical filters, Infrared radiation, Cancer, Tissue optics, Visible radiation, Spectroscopy, Point-of-care devices, Melanoma

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Skin cancer, in all its various forms has been identified by the American Cancer Society as the most common form of cancer in both the United States and worldwide. In fact, more Americans will be diagnosed with skin cancer than all other forms of cancer combined. Typically, initial skin cancer diagnosis relies on the asymmetry, border, core, diameter, and evolution (ABCDE) test. As a subjective test, the ABCDE method relies on the skill of the practitioner to provide an accurate diagnosis. Therefore, a diagnostic instrument that could be used as an initial screening tool to determine whether a skin lesion is potentially cancerous would have significant application. This need is especially acute in under-served communities without ready-access to skilled practitioners. It also could have widespread applicability at the point-of-care to reduce the strain on clinical dermatologists. We have recently demonstrated preliminary results showing the capability to discriminate between healthy skin and cancerous lesions using an infrared method inspired by human color vision. This technique relies on identifying variations in the infrared (IR) spectra of healthy and cancerous tissue; however, unlike standard IR-spectroscopic sensing methods it does not require the use of a spectrometer. Rather, this approach utilizes the response through three IR optical filters; similar to the method that human eye uses to discriminate between hundreds of thousands of colors in the natural world. Here, we report on calculated studies demonstrating the selectivity of this approach for various types of cancerous lesions including melanomas. We explore various potential optical filter sets to discriminate not only between healthy and cancerous tissue, but also to determine whether it may be possible to discriminate between various types of melanoma lesions using this bioinspired method. These results demonstrate that this approach has potential as a low-cost, widely deployed sensing method for detection of cancerous skin lesions, prior to examination by a trained specialist.

Proceedings Article | 19 May 2020 Presentation + Paper

Design and operation of a human color vision inspired sensor for proximate standoff detection

Kevin Major, Jasbinder Sanghera, L. Brandon Shaw, Kenneth Ewing

Proceedings Volume 11416, 114160B (2020) https://doi.org/10.1117/12.2558802

KEYWORDS: FT-IR spectroscopy, Aluminum, Optical filters, Bandpass filters, Sensors, Standoff detection, Mirrors, Absorption, Biomimetics, Color vision

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Proceedings Article | 20 February 2020 Presentation + Paper

A biomimetic optical approach to skin cancer detection

Kenneth Ewing, Kevin Major, Jasbinder Sanghera

Proceedings Volume 11233, 1123309 (2020) https://doi.org/10.1117/12.2554642

KEYWORDS: Skin, Melanoma, Biomimetics, Skin cancer, Sensors, Optical filters, Tissue optics, Infrared spectroscopy, Spectroscopy, FT-IR spectroscopy

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Proceedings Article | 17 May 2019 Paper

Infrared reflectance characterization of ammonium nitrate residue on roughened aluminum for potential bioinspired stand-off sensor

Thomas Hutchens, Christopher Wilson, Matthew Potter, Menelaos Poutous, Kevin Major, Kenneth Ewing, Jasbinder Sanghera, Ishwar Aggarwal

Proceedings Volume 11010, 1101018 (2019) https://doi.org/10.1117/12.2519110

KEYWORDS: Aluminum, Sensors, Absorption, Mid-IR, Long wavelength infrared, Spectroscopy, Reflectivity, Explosives

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Proceedings Article | 17 May 2019 Paper

Examination of stochastic and ordered methods to select optical filters for discrimination between chemical vibrational absorption bands

Kevin Major, Jasbinder Sanghera, Thomas Hutchens, Menelaos Poutous, Ishwar Aggarwal, Kenneth Ewing

Proceedings Volume 11010, 1101017 (2019) https://doi.org/10.1117/12.2518238

KEYWORDS: Optical filters, Algorithms, Stochastic processes, Absorption, Infrared spectroscopy, Biomimetics, Chemical analysis, Biological and chemical sensing, Color vision, Infrared sensors

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Proceedings Article | 17 May 2019 Paper

Experimental considerations for the proximate standoff detection of highly scattering hazardous materials using infrared techniques

Kevin Major, Jasbinder Sanghera, Mikella Farrell, Ellen Holthoff, Paul Pellegrino, Thomas Hutchens, Ishwar Aggarwal, Kenneth Ewing

Proceedings Volume 11010, 1101006 (2019) https://doi.org/10.1117/12.2518231

KEYWORDS: Optical filters, Standoff detection, Explosives, Sensors, Biomimetics, FT-IR spectroscopy, Scattering, Infrared spectroscopy, Diffuse reflectance spectroscopy, Biosensing

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Proceedings Article | 23 May 2018 Paper

Enabling standoff detection of hazardous materials using a fiber optic coupled quantum cascade infrared laser system

Kenneth Ewing, Kevin Major, Jasbinder Sanghera, Rafael Gattass, L. Brandon Shaw, Lynda Busse, David Arnone, Enrique Lopez, Michael Pushkarsky, Justin Kane, Rhea Clewes, Linda Lee, Chris Howle

Proceedings Volume 10629, 106290A (2018) https://doi.org/10.1117/12.2304352

KEYWORDS: Quantum cascade lasers, Standoff detection, Explosives, Infrared spectroscopy, Cameras, Optical fibers, Infrared radiation, Long wavelength infrared, Sensors

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Proceedings Article | 16 May 2018 Paper

High-confidence discrimination of explosive materials on surfaces using a non-spectroscopic optical biomimetic sensing method

Kevin Major, Kenneth Ewing, Jasbinder Sanghera, Thomas Hutchens, Menelaos Poutous, Matthew Potter, Christopher Wilson, Ishwar Aggarwal, Mikella Farrell, Ellen Holthoff, Paul Pellegrino

Proceedings Volume 10629, 106290P (2018) https://doi.org/10.1117/12.2304349

KEYWORDS: Biomimetics, Explosives, Optical filters, Mid-IR, Long wavelength infrared, Biosensing, Sensors, Optical sensing, Infrared sensors, FT-IR spectroscopy

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Proceedings Article | 17 February 2017 Paper

Analyte detection in complex samples using a biomimetic, non-spectroscopic sensing method

Kevin Major, Menelaos Poutous, Ishwar Aggarwal, Jasbinder Sanghera, Kenneth Ewing

Proceedings Volume 10072, 100720Z (2017) https://doi.org/10.1117/12.2252890

KEYWORDS: Absorption, Statistical analysis, Optical sensing, Infrared radiation, Optical filters, Biological research, Biomimetics, Biosensing, Absorption spectroscopy, Molecules, Bioalcohols, Data modeling, FT-IR spectroscopy, Chemical analysis, Sensors

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Proceedings Article | 12 July 2016 Paper

Applicability of ion mobility spectrometry for detection of quarantine pests in wood

K. Ewing, J. Sanghera, S. Myers, A. Ervin, C. Carey, G. Gleason, L. Mosser, L. Levy, M. Hennessey, R. Bulluck

Proceedings Volume 9864, 98640P (2016) https://doi.org/10.1117/12.2223877

KEYWORDS: Inspection, Spectroscopy, Target detection, Optical inspection, Agriculture, Solids, Ions, Bromine, Neodymium, Chemical analysis

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Proceedings Article | 3 May 2016 Paper

Evaluation of a biomimetic optical-filter based chemical sensor for detection of hazardous chemical vapors in the infrared

Kevin Major, Menelaos Poutous, Kevin Dunnill, Kenneth Ewing, Jasbinder Sanghera, P. Deguzman, Ishwar Aggarwal

Proceedings Volume 9823, 98230U (2016) https://doi.org/10.1117/12.2224145

KEYWORDS: Optical filters, Biomimetics, Mid-IR, Target detection, Infrared radiation, Absorption, Chemical fiber sensors, Sensors, Signal detection, Chemical analysis

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Proceedings Article | 3 June 2015 Paper

Filter selection criteria for the discrimination of strongly overlapping chemical spectra

Kevin Major, Menelaos Poutous, Kevin Dunnill, Kenneth Ewing, Jasbinder Sanghera, Ishwar Aggarwal

Proceedings Volume 9482, 948213 (2015) https://doi.org/10.1117/12.2176623

KEYWORDS: Optical filters, Biological and chemical sensing, Chemical analysis, Absorption, Sensors, Infrared radiation, Signal detection, Absorption filters, Infrared signatures, Sensing systems

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Proceedings Article | 29 May 2014 Paper

Investigation of disturbed earth detection in the very long wavelength infrared (VLWIR)

K. Ewing, J. Sanghera

Proceedings Volume 9072, 90721E (2014) https://doi.org/10.1117/12.2058869

KEYWORDS: Silica, Particles, Reflectivity, Neodymium, Long wavelength infrared, Infrared radiation, Land mines, Infrared imaging, Target detection, Black bodies

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Proceedings Article | 29 May 2014 Paper

Filter-based chemical sensors for hazardous materials

Kevin Major, Kenneth Ewing, Menelaos Poutous, Jasbinder Sanghera, Ishwar Aggarwal

Proceedings Volume 9072, 907212 (2014) https://doi.org/10.1117/12.2050437

KEYWORDS: Optical filters, Explosives, FT-IR spectroscopy, Infrared radiation, Infrared spectroscopy, Absorption, Humidity, Gaussian filters, Explosives detection, Environmental sensing

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Proceedings Article | 3 June 2011 Paper

Mid-infrared optical fiber Fourier transform infrared spectrometer

Kenneth Ewing, L. Brandon Shaw, Rick Kim, Rafael Gattass, Jas Sanghera, Ish Aggarwal

Proceedings Volume 8018, 80180U (2011) https://doi.org/10.1117/12.883529

KEYWORDS: Optical fibers, FT-IR spectroscopy, Mid-IR, Infrared spectroscopy, Sensors, Interferometers, Chalcogenides, Infrared radiation, Supercontinuum sources, Spectroscopy

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Proceedings Article | 16 December 2004 Paper

Kromoscopy for detection of chemical warfare agents

Kenneth Ewing, Jas Sanghera, Ishwar Aggarwal, Myron Block

Proceedings Volume 5585, (2004) https://doi.org/10.1117/12.575636

KEYWORDS: Sensors, Carbon, Optical filters, Absorbance, Nerve agents, Mid-IR, Infrared sensors, Beam splitters, Toxic industrial chemicals

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Proceedings Article | 22 February 2002 Paper

Using solid phase extraction media to increase the sensitivity of infrared and Raman spectroscopy

Kenneth Ewing

Proceedings Volume 4577, (2002) https://doi.org/10.1117/12.455748

KEYWORDS: Raman spectroscopy, Infrared spectroscopy, Solids, Infrared radiation, Spectroscopy, Magnesium, Chemical analysis, Spectroscopes, Infrared detectors, Nerve agents

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Proceedings Article | 2 January 1998 Paper

Fiber optic sensor system for detection of organic contaminants in soil

G. Nau, J. McVicker, Frank Bucholtz, Kenneth Ewing, Sandeep Vohra, Jasbinder Sanghera, Ishwar Aggarwal, Jane Adams, D. Eng

Proceedings Volume 3211, (1998) https://doi.org/10.1117/12.345567

KEYWORDS: Fiber optics sensors, Soil contamination, Infrared spectroscopy, Infrared imaging, Fiber optics, Infrared radiation, Spectroscopy, Soil science

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Proceedings Article | 9 October 1995 Paper

IR fiber optic chemical sensors for hazardous waste detection

Kenneth Ewing, Gregory Nau, Frank Bucholtz, Ishwar Aggarwal

Proceedings Volume 2504, (1995) https://doi.org/10.1117/12.224084

KEYWORDS: Fiber optics, Design for manufacturing, Fiber optics sensors, Chemical fiber sensors, Infrared detectors, Infrared spectroscopy, Infrared radiation, Reflectance spectroscopy, Liquids, Ocean optics

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Proceedings Article | 9 October 1995 Paper

Fiber optic IR reflectance sensor for the cone penetrometer

Gregory Nau, Frank Bucholtz, Kenneth Ewing, Sandeep Vohra, Jasbinder Sanghera, Ishwar Aggarwal

Proceedings Volume 2504, (1995) https://doi.org/10.1117/12.224110

KEYWORDS: Sensors, Reflectivity, Design for manufacturing, Infrared sensors, Mirrors, Fiber optics, Chalcogenides, Ocean optics, Optical fibers, Absorption

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Proceedings Article | 19 January 1995 Paper

Detection of trace levels of volatile organic compounds using fiber optic Raman spectrometry

Kenneth Ewing, Tom Bilodeau, Gregory Nau, Frank Bucholtz, Ishwar Aggarwal

Proceedings Volume 2367, (1995) https://doi.org/10.1117/12.199659

KEYWORDS: Raman spectroscopy, Fiber optics, Spectroscopy, Carbon, Sensors, Optical fibers, Infrared spectroscopy, Fiber optics sensors, Infrared radiation, Monochromators

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Proceedings Article | 19 January 1995 Paper

Fiber optic infrared reflectance probe for detection of hydrocarbon fuels in soil

Kenneth Ewing, Tom Bilodeau, Gregory Nau, Ishwar Aggarwal, T. King, Roger Clark, George Robitaille

Proceedings Volume 2367, (1995) https://doi.org/10.1117/12.199674

KEYWORDS: Design for manufacturing, Reflectivity, Infrared radiation, Fiber optics, Spectroscopy, Statistical analysis, Optical fibers, Infrared detectors, Soil contamination, Ocean optics

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Proceedings Article | 10 March 1994 Paper

Fiber optic raman probe detection of chlorinated hydrocarbons in standard soils

Tom Bilodeau, Kenneth Ewing, I. Kraucunas, J. Jaganathan, Gregory Nau, Ishwar Aggarwal, Fred Reich, Stephen Mech

Proceedings Volume 2068, (1994) https://doi.org/10.1117/12.170672

KEYWORDS: Raman spectroscopy, Particles, Fiber optics, Soil contamination, Soil science, Spectroscopy, Chemical fiber sensors, Silica, Interfaces, Fiber optics tests

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